Decorative board of sound hole of guitar



FIG. 1 is a front view of a decorative board of a sound hole of a guitar showing my new design;

FIG. 2 is one side view thereof, the opposite side view being a identical;

FIG. 3 is a bottom view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a rear view thereof. 

The ornamental design for a decorative board of sound hole of guitar, as shown and described. 